[This is an updated review; some of the issues that existed when the N97 was first released have since been addressed. Also, I have moved some of the more elaborate details of the original text into a new review ("A Guide") that I created for the white version.]
Nokia E- and N-series phones have for some years now had, by far, more capabilities than anything else out there – but they have not always been the sexiest or had the widest mass appeal. Plus, although Nokia sell more smartphones than anyone else worldwide, they have not targeted or marketed the US market very heavily (thanks in part to our combination of non-standard wireless technologies and frequencies, consumers’ focus on style over substance, and Nokia’s unwillingness to cater to the fairly heavy-handed branding and crippling of functionality demanded by US network providers).
Much of that is changing with the N97. As you can see it definitely has the visual appeal. Also, its main enhancements over the most recent N-series phones (such as the N95, N96 and N85) are user interface centric:
>> 640×360 WVGA LCD
>> Touch screen
>> QWERTY keypad
>> Faster CPU (ARM11 at 420 MHz vs. 332/369 MHz in the N95/N85, and two ARM9 cores at 265 MHz in the N96)
>> Configurable widgets for the home screen
There are a couple of other improvements as well:
>> 32GB of built-in storage, µSDHC card slot for up to 32GB more (Nokia always advertise only the tested configuration, 16GB)
>> Additional sensors: Magnometer (electronic compass), Proximity